diff --git a/doc/release/upcoming_changes/23011.deprecation.rst b/doc/release/upcoming_changes/23011.deprecation.rst
new file mode 100644
index 000000000000..72168ff87d4b
--- /dev/null
+++ b/doc/release/upcoming_changes/23011.deprecation.rst
@@ -0,0 +1 @@
+* ``np.finfo(None)`` is deprecated.
diff --git a/numpy/core/getlimits.py b/numpy/core/getlimits.py
index 5baeb97fe363..8146c46449ca 100644
--- a/numpy/core/getlimits.py
+++ b/numpy/core/getlimits.py
@@ -471,6 +471,15 @@ class finfo:
     _finfo_cache = {}
 
     def __new__(cls, dtype):
+        if dtype is None:
+            # Deprecated in NumPy 1.25, 2023-01-16
+            warnings.warn(
+                "finfo() dtype cannot be None. This behavior will "
+                "raise an error in the future. (Deprecated in NumPy 1.25)",
+                DeprecationWarning,
+                stacklevel=2
+            )
+
         try:
             dtype = numeric.dtype(dtype)
         except TypeError:
diff --git a/numpy/core/tests/test_deprecations.py b/numpy/core/tests/test_deprecations.py
index 83777cc9cd18..d82ae001c66f 100644
--- a/numpy/core/tests/test_deprecations.py
+++ b/numpy/core/tests/test_deprecations.py
@@ -1107,3 +1107,9 @@ def test_attributeerror_includes_info(self, name):
         msg = f".*\n`np.{name}` was a deprecated alias for the builtin"
         with pytest.raises(AttributeError, match=msg):
             getattr(np, name)
+
+
+class TestDeprecatedFinfo(_DeprecationTestCase):
+    # Deprecated in NumPy 1.25, 2023-01-16
+    def test_deprecated_none(self):
+        self.assert_deprecated(np.finfo, args=(None,))